<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            width: 200px;
            height: 400px;
            margin: auto;
            margin-top: 20px;
            background-color: #ffbb33;
        }
        div.ellipse {
            border-radius: 100% 0 0 0;
        }
    </style>
</head>
<body>
<div class="ellipse"></div>
</body>
</html>